/Engine/Source/Runtime/Engine/Public/PacketHandlers/StatelessConnectHandlerComponent.h
IMPORTANT: This MUST be accurate, and should represent the worst-case number of reserved bits expected from the component. If this is inaccurate, packets will randomly fail to send, in rare cases which are extremely hard to trace.
The worst-case reserved packet bits for the component
virtual int32 GetReservedPacketBits() const